Back to Tools
Password Strength Checker
Password Strength Checker
Analyze how secure your password is against modern hacking techniques
Deep Security Audit
Analytically Strong
0%
Overall Score
0
Entropy (Bits)
0
Total Combinations
U: Upper, l: Lower, D: Digit, S: Symbol
NIST SP 800-63
Fail
HIPAA (Sec Rule)
Fail
PCI DSS 4.0
Fail
Standard Desktop PC
Instantly
GPU Hacking Rig (8x 4090)
Instantly
Government Supercomputer
Instantly
0
Uppercase
0
Lowercase
0
Numbers
0
Symbols
Enter a password to see a full security profile and recommendations.
About the Password Strength Checker
Test how strong a password is and get tips to improve it.
How to use the Password Strength Checker
- Type a password to test.
- Press Analyze Strength.
- Read the score, the estimated time to crack it, and the advice.
Formula and method
Strength depends mostly on length and randomness. Entropy ≈ length × log₂(number of possible characters). A random 8-letter lowercase password has about 37.6 bits, while 12 random letters and numbers has about 71.5 bits.
Tips
- Length matters most. A passphrase of four or more random words is strong and easy to remember.
- Never reuse passwords, and use a password manager.
- Avoid testing your real password on any website. Test a similar one instead.
Frequently Asked Questions
It is better not to. Test a similar password with the same length and pattern instead.